Improved car-wheel



J. HARRIS.

. Car Wheel.

No. 50,579. Patented 0m. 24, 1865.

MPETERS. PHOTO-LITHOGRAPHER WASHINGTON D C UNITED STATES PATENT OFFIoJOHN HARRIS, OF MARQUETTE, WISCONSIN.

IMPROVED CAR-WHEEL.

Specification forming part of Letters Patent No. 50,579, dated October24, 1865.

To all whom it may concern:

Be it known that I, J. HARRIS, of Marquette, in the county of Green Lakeand State of Wisconsin, have invented a new and useful Improvement inOar-Wheels; and I do hereby declare that the following is a full, clear,and exact description thereof, which will enable others skilled in theart to make and use the same, reference being had to theaccompanyingdrawiiigs,for1ning partotthis specification, in which Figure1 is a view of a caraxle with two wheels upon it, one of which is insection, as indicated by the line 00 w,Fig.2; Fig.2 a transverse sectionof the axle, taken in the line y 3 Fig. 1.

Similar letters of reference indicate like parts.

This invention consists in constructing aoarwheel of two concentricparts, one part being fitted on the other, and arranged in such a mannerthat a car-truck may pass over curvatures in the road without subjectingeither the axles or the wheels to any undue strain, as a revolvingmovement is allowed the outer part of each wheel independent of itsaxle.

A represents a car-axle, which may be constructed in the usual manner,and having two circular hubs, B B,firmly secured upon it, one near eachend, in the same manner as ordinary car-wheels are now applied, saidhubs always turning with the axle. These hubs are formed or cast with aflange, a, at the outer edges of their peripheries, and circularplates-Qwhich are fitted loosely on the axle, are bolted to the innersides of the hubs, the plates 0 projecting out beyond the peripheries ofthe hubs a distance equal to the flan ges a, as shown clearly in Fig. 1.These plates 0 are secured to the hubs B by screwbolts 1), and on thesehubs circular rims D are fitted,whioh form the outer "ill ii parts ofthe wheels, and are provided with the usual flange, 0. The inner partsof the rims D are fitted between the flanges a and the plates 0 of thehubs B, and said parts may be pressed against the rims D in a greater orless degree by adjusting the bolts 1), packing being interspersedbetween the plates 0 and the hubs B and rims D. When the car or truck ismoving over a straight road the rims D will turn with the hubs B,sufficient friction being between them to efi'eot that end; but inpassing over curves the axles and hubs have a movement independent ofthe rims D, the rims turning on the hubs,thereby avoiding the drag andslip attending the ordinary wheels, which are permanently secured on theaxle. Besides this advantage the invention possesses the one o renderingthe brakes far more efficient than usual, as the shoes, when the brakesare applied in pressing against the rims D, cause the latter to pressagainst the hubs B, thereby creating more friction than is produced bythe application of the brakes to the ordinary wheels.

I claim as new and desire to secure by Letters Patent- 1. A car-wheelconstructed of two parts, B D, fitted one upon the other, and the innerparts keyed or otherwise secured firmly on the axle,substantially as andfor the purposes set forth.

2. Constructing the inner part or hub, B, of the wheel with a flange, a,and using, in connection therewith, a plate, 0, bolted to the hub, withor without the packing interspersed between, substantially as and forthe purpose specified.

JOHN HARRIS.

Witnesses:

L. O. VINE, CHAS. KNAPP.

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